Can send but not receive emails (Ubuntu 7.10)

I have followed the Howto for a perfect server Ubuntu 7.10 and have installed ispconfig on top of it (plus ZEND Optimiser and ioncube loader).
Let me thank at this point the authors of these instructions for their phantastic work and dedication to the subject. Althought truely not new to computers (yes, I coded in assembler a VERY long time ago) I am certainly new to LINUX and server configuration. This allowed me to get through the install in give or take a day. Thanks again.

Now it I have an issue with receiving emails and it appears I have a few issues with DNS. I can send emails allright, but I receive nothing. There is however no message coming back telling me the email address cannot be reached (as it can). But it ends up, it seems, - nowhere. In ispconfig all services are showing 'ONLINE' status.

By the way, I noticed, that in the local-host-names there was everything in there that has a DNS A record - with exception of mail.chillinet.net. Does that matter? Well, I added it in for good measure - still no improvement...

Interesting thought: The log above shows 12 received but 0 retrieved. Not sure what 'top' or 'time' means. Any further suggestions?

Beste Gruesse

Appendix

/etc/postfix/main.cf
# Debian specific: Specifying a file name will cause the first
# line of that file to be used as the name. The Debian default
# is /etc/mailname.
# myorigin = /etc/mailname

smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu)
biff = no

# appending .domain is the MUA's job.
append_dot_mydomain = no

# Uncomment the next line to generate "delayed mail" warnings
#delay_warning_time = 4h

The mail log lines that you posted does not contain a line about a mail delivery or even a mail delivery attempt. It looks like the email never reaches your server. Please install one of the webmail pacakes for ISPConfig and send a email to a local account with webmail on your ispconfig server.

I am wondering whether or not DNS is the problem. I can ping www.chillifire.net allright, but I cannot ping finch.chillifire.net, ns.chillifire.net, and mail.chillifire.net. But have a look again at my DNS configuration of ISPconfig again (below). There are A records for all of those host names. Should I not be able to ping them therefore? and how if it cannot be pinged, is the mail delivery to mail.chillifire.net going to work? Again, is there something wrong with DNS?